Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    2.046087E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-12T16:48:13+0800
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    1 Object 1

    AOE ID 53849
    NORAD ID 53849
    Object Type PAYLOAD
    Country
    US US
    VS

    2 Object 2

    AOE ID 63833
    NORAD ID 63833
    Object Type PAYLOAD
    Country
    IT IT

    Conjunction Constraints

    Parameter STARLINK-4770 HERMES 4
    Time of Closest Approach 2026-09-14T13:23:41+0000
    Collision Probability (Pc) 2.046087E-6
    Conjunction Distance (km) 1.811 km
    Relative Speed (km/s) 5.741 km/s
    Conjunction Risk Parameters R (Radial): -1.538 | I (In-track): -0.883 | C (Cross-track): 0.362
    Collision Risk Index (CRI) 0.41
    X Position (km) -5994.623 -5996.099
    Position Y (km) 3313.117 3313.652
    Position Z (km) -94.175 -93.273
    Velocity X (km/s) -2.279 0.39
    Velocity Y (km/s) -3.966 0.903
    Velocity Z (km/s) 6.108 7.565

    Orbital Parameters 国际轨道数据源

    Parameter STARLINK-4770 HERMES 4
    Semimajor Axis (a) 6848.889 km 6847.924 km
    Eccentricity (e) 0.000135 0.000079
    Inclination (i) 53.1592° 97.3751°
    RAAN 162.9044° 148.1111°
    Perigee Argument 82.6183° 226.7207°
    Mean Anomaly (M) 277.4971° 133.3969°
    Apogee 471.674 km 470.326 km
    Perigee 469.830 km 469.248 km
    Orbit Epoch 2026-09-12T03:27:25+0000 2026-09-11T16:25:34+0000

    STARLINK-4770 & HERMES 4 Collision Probability (Pc) Trend

    STARLINK-4770 & HERMES 4 Collision Probability (Pc) TrendNot Available

    STARLINK-4770 & HERMES 4 Miss Distance (Miss Distance) Trend

    STARLINK-4770 & HERMES 4 Miss Distance (Miss Distance) TrendNot Available

    STARLINK-4770Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    HERMES 4Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    STARLINK-4770Collision Probability Trend

    Object 1 Probability TrendNot Available

    HERMES 4Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with STARLINK-4770

    No nearby objects data